Hydrological Modelling Of Maranhão And
Pracana Basins, A First Approach
Author(s)
A. Venâncio, F. Martins & R. Neves
Abstract
Modelling the hydrology of hydrographic basins has shown itself to be a useful
tool in environment management. The hydrological models can be used for
multiple purposes: to estimate runoff from sequences of rainfall, to access stream
water quality and to quantify the diffuse pollution that reaches water masses such
as estuaries, rivers and lakes, etc. This study has, as final objective, to simulate
and analyse the flow, sediment transport and water quality as a function of land
use and soil type in the basins of Maranhão and Pracana. The modelling system
used is SWAT, Soil Water Assessment Tool. In this first phase of the study the
hydrodynamic calibration of the model was performed using measurements of
average daily flows in five stations. The model compares well with the
measurements; the annual average flows are similar and the majority of the
measured flow peaks coincide with the model peaks.
Keywords: hydrological models, swat, environment management, runoff, diffuse
pollution.
1 Introduction
The applicability of hydrological models for environmental issues is gaining
wide support. The spatial information of processes needed for evaluate
alternative watershed managements with adoption of geographic information
system (GIS) technology is now becoming a usual and efficient tool,
Heidenreich et al [1]. In SWAT, this approach is used: the menu interface
provides a tool to identify the relative contribution of sub-watershed areas to
nonpoint source pollution and to evaluate the effects of alternative land use
management practices on surface and ground water quality at the watershed
Keywords
hydrological models, swat, environment management, runoff, diffuse
pollution.
Related Book
Other papers in this volume
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